Summary: Bought this receiver a little over a year ago to update our home theater to HDMI. Researched a lot of receivers and decided on this one due to its good specs for the money. Had Pioneer before and all were great. Not this one. The worst user manual I've ever seen and I am tech savvy. The interface with the receiver for adjustments and changes can only be done with the horribly complex remote and then is layer upon layer and sub-menu upon sub-menus.
Summary: Mine broke after only a couple months of use. Unfortunately it is already out of warranty (it sat in the box new for 9 months or so), and Pioneer won't even service it (which isn't obvious on their website, it just doesn't accept the model, which was very frustrating; I had to call them to figure this out). Given the other reviewers in here that have had similar experiences, it sounds like this is a common problem, so buying this receiver is like playing roulette.
Summary: I purchased a Pioneer VSX-921 to replace an Insignia unit. The Pioneer worked flawlessly for several months, then the problems began. One by one it started dropping audio, but not the video, from each of the HDMI inputs. I have a whole house surge arrestor on my main panel and a point-of-use surge arrestor receptacle with an on-line UPS feeding my electronics. For the price, the cheap Best Buy brand was a better deal.
Summary: I bought this as a replacement for my old VSX-D309, and was very happy with it until it quit working roughly 80 days after purchasing it. The unit no longer sends any form of audio to the speakers yet still sends video to the tv (for those wondering i have checked all the settings including resetting it to factory defaults as well as checking all the connections).
Summary: Can't believe anyone could manage to make a simple thing (amplify a few noises from a few sources) so difficult. This is probably the worst thing I have ever purchased. I would urge anyone to look elsewhere. Sound is OK (little depth and very "clinical") but the day to day use is unfathomable. The Remote has buttons for functions that do not seem to exist. I regularly get stuck in a loop of "Zone 2" with no sound coming out of the box at all.
Summary: Just to qualify myself (and without wanting to sound like a loser) I studied degree level electronics, am very tech-savvy and would like to think I can wire up an amp. But in this case I was absolutely baffled. The whole exprience was horrendous. The remote was illogical and simple tasks like adjusting the volume still have me baffled.